|Source||E.coli strain that carries the cloned Apa I gene from Acetobacter pasteurianus|
|Assayed on||Lambda DNA (dam-dcm-, BamHI-digest)|
|Unit definition||One unit of the enzyme is the amount required to hydrolyze 1 μg of Lambda DNA (dam-dcm-, BamHI-digest) in 1 hour at 37°C in a total reaction volume of 50 μl.|
|Optimal SE-buffer||Y (33 mM Tris-acetate (pH 7.9 at 25°C); 10 mM magnesium acetate; 66 mM potassium acetate; 1 mM DTT.) + BSA|
|Enzyme activity (%)|
|50 - 75||25 - 50||0 - 10||0 - 10||100||50|
|Storage conditions||10 mM Tris-HCl (pH 7.5); 200 mM NaCl; 0.1 mM EDTA; 7 mM 2-mercaptoethanol; 200 μg/ml BSA; 50% glycerol. Store at -20°C.|
|Ligations||After 50-fold overdigestion with enzyme more than 95% of the DNA fragments can be ligated and recut.|
|Non-specific hydrolisis||No nonspecific activity was detected after incubation of 1 μg of Lambda DNA with 100 u.a. of enzyme for 16 hours at 37°C.
|Reagents Supplied with Enzyme||
10 X SE-buffer Y, BSA (except E019m, E019T and E020T).|
For E019T and E020T an additional 10X SE-buffer ROSE is supplied.
|Methylation sensitivity||Blocked by overlapping Dcm methylation(CmCWGG): GGGCCCWGG|
|Inactivation 20 minutes under||65oC|
|Notes||To obtain 100% activity, BSA should be added to the 1x reaction mix to a final concentration of 100 μg/ml.|
Do not use BSA for long incubation.
|Quality control||Restriction Endonucleases: Quality Control|
|MSDS:||Download MSDS as PDF|
|References:||Seurinck, J., Van de Voorde, A., Van Montagu, M. Nucleic Acids. Res.11: 4409-4415 (1983).|
|Theoretical diagrams of DNA digestion by this enzyme for the most known DNA substrates:|
To view the fragments length values please point mouse cursor over diagram
M - ladder, 1 - Adeno-2 DNA, 2 - Lambda DNA, 3 - T7 DNA, 4 - pUC19, 5 - pBR322